My guess is that the U.S. Attorney set up the whole thing with the Magistrate Judge. The FBI claims to have not been a part of this. Interesting because the FBI / Marshall’s Service is controlling access to the hospital room.
Somebody wanted him to shutup. And I think it was a U. S. Attorney who elected to use the public safety approach to begin with. There was female U. S. Attorney at most of the press conferences and she announced it there.
So someone elsewhere got other feds involved to shut him up, unless the female attorney changed her mind, or had it changed for her.
This will probably be another in a growing list of coverups. And there's news now that the governor and feds are refusing to release any data about what welfare benefits the brothers and their family might have received - privacy considerations.